Sand-blast apparatus.



PATENTED PEB. 7, 1905.

F. W. RBINHARDT.

SAND BLAST APPARATUS. APPLIoATIoN FILED JUNE 18.1904.

2 SHEETS-SHEET 1.

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No. 781,965. PATENTED FEB. '7, 1905. P. W. REINHARDT.

SAND BLAST APPARATUS.

APPLIOATION FILED JUNE 18,1904.

2 SHEETS-SHEET 2.

Patented February '7, 1905.

UNITED STATES PATENT UEEICE.

FREDERICK 1V. REINI-IARDT, OF MONACA, PENNSYLVANIA.

SAN D-BLAST APPARATUS.

SPECIFICATION forming part of Letters Patent No. 781,965, dated February 7, 1905.

Application tiled .Tune 18, 1904. Serial No. 213,129.

Be it known that I, FREDERICK XV. REIN- ver and State of Pennsylvania, have invented l certain new and useful Improvements in Sand- Blast Apparatus, of which the following is a specification, reference being. had therein to the accompanying drawings.

This invention relates to a sand-blast apparatus, and relates in particular to dry-sandblast apparatus especially adapted for sandblasting the interior and exterior surfaces of' globes, shades, and other hollow articles.

ln the preferred manner of carrying my invention into practice I impel the sand against the article to be engraved by air-suction instead of a blast of' air-that is, l cause the sand to be drawn into a chamber and driven against the article to be engraved by a draft of air created by suction. 1t is, however, practicable by the use of my improved apparatus to 'force the sand against the glass b v a blast of' air and to utilize the means for creating suction for the purpose of removing the dust that is created during the operation of the apparatus.

)Lv invention consists in the novel construction, combination, and arrangement of parts hereinafter described and claimed.

ln the accompanying drawings, wherein like numerals of reference are used to designate similar parts in the several figures, Figure 1 is a side elevation of my improved apparatus. Fig. 2 is a vertical sectional view looking' in a direction opposite to that from which Fig. l is taken, said view being taken on the line Q 2 of Fig. 3. Fig. 3 is a top plan view with the lid of the apparatus removed. Fig. 4 is a view similar to Fig. 3, showing a modified Aform of apparatus which l employ when the exterior surface of articles are to be treated. Figs. 5 and 6 are detail perspective views of' parts of the apparatus shown on an enlarged scale; and Fig. T is a top plan view, also on an enlarged scale, of another part of the apparatus.

The articles to be treated are during their ing.

treatment placed in a box'or casing l, which is of suitable size and shape and is mounted on legs 2 3. The casing l has a hinged lid et, and the upper edge of the casing is provided with a bead 5, the upper edge of the casing and the bead being covered by a strip of rubber 6, while a similar strip of rubber 7 is arranged at the edges of the lid, sothat the lid will forni a tight joint with the upper edge of the casing. Upon the bottom of the box or casing 1 is arranged a conical sand-hopper 8, which is suspended from the box or casing by straps 9, that are hung on pivots l0. The hopper 8 is attached, by a flexible diaphragm l1. to a plate 12, fixed on the bottom of the casing, and a pipe l?) passes through the hopper and up into the casing, projecting a short distance above the bottom thereof, and a similar flexible diaphragm Il is arranged within the casing and attached to the pipe i3 and the bottom of the casing, so as to provide a fiexible attachment between the casing and the pipe and allow of' the pipe having a movement relatively to the bottom of the casrlhe pipe 13 passes through the bottom of the hopper and extends a short distance below said hopper, and in one operation of the machine the end of this pipe is open, so that air may enter freely, and in another operation of the machine, where a forced draft is to be used to impel the sand, a pipe 15 is connected to the pipe 13 by a union 16, the said pipe l5 leading to a suitable source of supply of air under pressure, such as a fan or pump. The hopper is connected by a pitman 16/ with a crank '1T on a shaft 18, that is journaled in suitable bearings 19 and that carries a pulley 2O on its outer end.

Vithin the casing 1 and held in position against the side thereof' by means which will be hereinafter described is a frame, (shown in detail in Fig. 5,) the said frame consisting' of slotted arms Q1 22 23 24, all formed integral with a central vertical slotted arm 25, andthe said frame is sustained in position by means journaled in a bracket 28, which is fastened to the outside of the frame by bolts 29, and the shaft 26 carries a hand-wheel 30, by means of which the shaft can be turned when desired, so as to swing the frame around in a circular plane, the shaft 26 being' squared where it passes through the slot or any of the slots in the said arms of the frame. A flat spring 30 is interposed between the hand-wheel 30 and the bracket 28, the said spring being fixed to the bracket at its center and being adjusted to press more or less strongly at its ends against the outer face of the hand-wheel30 by adjusting screws 28 and nuts 29. A slotted bar 31 is adjustably held in position against the said frame by means of a bolt 32, which has a squared body adapted to lit in any of the slots in the arms of the frame, and a nut 33, which screws on the bolt 32, serves to hold the bar 31 in any position to which it may be adjusted on the frame. The bar 31 has a projecting arm 34, which has formed on its end a sleeve 35, that receives a shaft 36, which' is revoluble in the sleeve and is longitudinally adjustable therein, being held in any desired position in the sleeve by collars 37 37 and setscrews 38 38, passing through these collars. The shaft 36 carries on its outer end a workholder or chuck 39, which is secured on the shaft by a set-screw 40, and the said workholder is provided with jaws 41 to sustain an article 42, such as a globe or shade, that is to be treated, and the work-holder or chuck 39 is provided with radial spokes 43, which are engaged by spokes 44, carried by a disk 45, that is fixed to a shaft 46, journaled on the side of the casing 1. The shaft 46 is journaled in the end of a slotted arm 47, which is adjustable in a slotted bracket 48, that is attached to the outside of the casing, the arm and the bracket being held in their adjusted position by a bolt 49 and thumb-nut 50, which bolt passes through the slot .in the bracket and the slot in the arm. A number of holes 51 are provided in the casing, so that-the shaft 46 can be passed through any one of these holes to secure an adjustment of the disk 45 relatively to the work-holder or chuck 39, those holes which are not in use being plugged during the operation of the apparatus. A pulley 52 is fixed on the outer end of the shaft 46, and by means of said pulley motion can be cornmunicated from a suitable source of power to the said shaft.

A suction-pipe 53 is arranged at one side of the casing, being in communication with the interior thereof, and suction is created in this pipe by means of any suitable suction apparatus connected therewith.

The operation of the apparatus is as follows: The 'article to be treated is mounted in the work-holder Yor chuck 39, and a rotary movement is imparted to Vthe work-holder from the pulley 52, shaft 46, disk 45, and arms 44. Meanwhile suction is applied to the pipe 53, which will draw air through the pipe 13, and the said pipe being' provided with holes 13 within the hopper 8 the sand in the hopper will run through the holes and be drawn upwardly and caused to strike the article 42 with suiiicient force to effect the desired result in the manner well known in the operation called sand-blasting. l/Vhile the sand is being drawn from the hopper in the manner described an oscillating movement is communicated to the hopper by motion imparted to the pulley 20, and the result of the movement of the hopper is that the upper end of the pipe 13 constantly changes its position so as to distribute the sand and direct it to every part of the article being treated. The dust which arises in the interior of the apparatus will be drawn olf through the suctionpipe 53, and as the operation proceeds the article 42 is turned around so as to present the different parts of the surface to the sand flowing up through the pipe 13. The workholder or chuck can be adjusted in position relatively to the upper end of the pipe 13 in a varietyy of ways. For instance, it may be adjusted longitudinally by loosening the collars 37 37 and moving the shaft 36 in either direction in the sleeve 35 to accomodate a longer or shorter article than that shown in the drawings. The angle of the work-holder to the pipe 13 can be adjusted by swinging the bar 31 around on the bolt 32 as a pivotal point, the portion of the bolt which passes through the slot in the bar 31 being round, while the portion of the bolt which passes through one of the slots in the frame is square. The slot in the bar 31 also permits of the longitudinal movement of the bar on the bolt 32 to secure additional adjustment, and the slots in the various arms allow of the frame being adjusted to a great variety of positions upon the shaft 26, and by turning the shaft 26 through the hand-wheel 30th@ frame may be adjusted to any position relatively to the said shaft by swinging it around in a circle, and by this means every portion of the surface of the article may be successively eX-` posed to the action of the sand coming through the pipe 13.

The operation of theY devices as above described is particularly adapted to the treatment of the interiors of hollow articles; but where the exterior surface of such articles is to be treated I prefer to employ the devices shown in Fig. 4 of the drawings, the other Aparts of the apparatus being dispensed with during the operation of the devices shown in Fig. 4 and, if desired, removed fromV the casing 1. The apparatus illustrated in Fig. 4 comprises a screw 54, which passes through a screw-threaded bearing 55, mount- IOO IIC)

ed on the end of the casing, said screw carrying ou its outer end a pulley 56 and an adjustable crank-handle 5T. The inner end of the screw .Si carries a shaft 5H, and on this shaft are mounted two chucks or work-holders 59 6l), said work-holders serving' to sustain two articles 6l 62 in the position shown in the drawing'. lVhere the parts are arrang'ed in this position, the sand coming through the pipe 13 will impinge against the exterior surface of the articles 61 62, and the said articles being' revolved and at the same time moved longitudinallyv by motion imparted to the screw either through the pulley 56 or the crank-handle 5T, every portion of the exterior surface of the two articles will be successively brought into proximity to the upper end of the pipe 13 and will be subjected to the direct action of the sand flowing therethrough.

As hereinbefore mentioned, the manner of causing' the sand being drawn through the pipe 13 to impinge against the article being' treated may be varied and instead of causing the sand to be drawn up through the pipe l?) solely by suction applied to the suctionpipe 5? the air-pipe l5 may be connected to the lower end of theI pipe 13 and a blast ot' air driven from the pipe l5 upwardly through the pipe 13, thereby forcing' the sand tlu'ough the pipe and into the casing instead of drawing it up solely by suction from the suctionpipe lYhen the last-named method ot' impelling' the sand is employed, the suction l unity to the end of said pipe, means for rotatfrom the suction-pipe serves solely to remove the dust from the interior of the casing, the operation ot' the devices for turning the article being treated being' the same in both cases.

Having described my invention, Vl claim-- 1.` ln a device of the type set forth, the combination of a casing, a sand-recejitacle arranged below said casing, a pipe passing' through said sand-receptacle and into said casing', means for sustaining' an article within the casing, means for projecting' sand through said pipe into said casing, and means for maintaining` the smul-receptacle in motion while the sand is being projected through the said pipe.

2. In a device of the type set forth, the combination of a 'asing, a sand-receptacle, a flexible diaphragm connecting said sand-receptacle to the casing, a sand-pipe passing through said receptacle into said casing, means for sustaining an article within the casing' in position to be acted on by the sand passing' through said pipe, and means for imparting movement to the said sand-receptacle.

3. ln a device of the type set forth, the combination of a casing, a sand-delivery pipe entering' said casing, means for projecting' sand through said pipe and into the casing, a

frame having' a plurality of intersecting slots, a shaft adapted to be lixed in any of the slots` said shaft being journaled iu thel side of the casing, means for turning said sha l't to swing the frame, a work-holding chuck iuljustably secured on said frame, and means for revolving' said chuck.

4. In adevice of thc type set forth, a casing, a sand-hopper attached to said casing', a sandpipe passing' into said hopper and into the casing, a work-holder or chuck revolubly mounted in the casing, said work-holder or chuck being provided with radial arms, radial arms engaging' the radial arms of the said chuck, a shaft on which the radial arms engaging the radial arms of the chuck are carried, a slotted arm in which said shaft is journaled, a slotted bracket adapted to sustain said slotted arm, and means for maintaining' the said arm in adjusted position on said bracket.

5. ln a sand-blast apparatus, the combination of a casing, a receptacle arranged below the same and adapted to hold sand, a pipe passinginto said casing and into said receptacle, means for sustaining' an article in proximity to the end ot' said pipe, and means for creating' a vacuum in the casing so as to suck the sand throughsaid pipe and impel itagainst the article' to be operated on.

6. 1n a sand-blast apparatus, the combination of a casing, a receptacle arranged below the same and adapted to hold sand, a pipe passing into said casing' and into said receptacle, means for sustaining' an article in proxing said article, and means for creating' a vacuum in the casingso as to suck the sand through said pipe and impel it against the article to be operated on.

T. In a sand-blast apparatus, the combination of a casing, a receptacle arranged below the same and adapted to hold sand, a pipe passing into said easing and into said receptacle, means for sustaining' an article in proximity to the end of said pipe, means for rotating' the said article, means for swinging the article in the arc of a circle, and means for creating a vacuum in the casing so as to suck the sand into the same and impel it against the article to be operated on.

8. In a device of the type set forth, a casing and a receptacle arranged therebelow, a vertical pipe having' its lower end in communication with said receptacle and its upper end opening' into said casing', means for supporting the work, and means in communication with the casing' for creating' a partial vacuum therein and in said pipe to force the material in the receptacle up through the pipe.

9. In a device of thel ty pe set forth, a casing and a receptacle, a pipe establishing' communication between the same, means for supporting the work in proximity to said pipe TOO log

llO

and means for creating a partial vacuum in material in said receptacle against said work the easing and in said pipe to project the maby means of said pipe. 10

terial in the receptacle against the Work. [n testimony Wliereofl affix my signature in l0. ln a maehineotl the type set forth, a easthe presence of two Witnesses.

ing having means for supporting the Work, a FREDERICK W. REINHARDT.

receptacle and a pipe Communicatingwith the /Vitnesses:

easing and receptacle, and means for creating JOHN WV. EARL,

a partial vacuum in the pipe to project the N. WURZEL, Jr. 

